GitHub-Proxy/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2025-09-17 20:03:17 +08:00
Code Issues Packages Projects Releases Wiki Activity

Make products always eval into expressions. Improves performance

Browse Source 
in benchmark. Still not as fasts as explicit eval(), strangely.
This commit is contained in:
Benoit Jacob 2008-05-02 08:53:23 +00:00
parent ef5b20bc50
commit 890a8de962
3 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Eigen/src/Core/Assign.h
View File

@ -114,6 +114,7 @@ Derived& MatrixBase<Derived>
{
// std::cout << typeid(OtherDerived).name() << "\n";
// std::cout << "lazyAssign = " << (Derived::Flags&VectorizableBit) << " " << (OtherDerived::Flags&VectorizableBit) << "\n";
// std::cout << __PRETTY_FUNCTION__ << std::endl;
ei_assignment_impl<Derived, OtherDerived>::execute(derived(),other.derived());
return derived();
}

2
Eigen/src/Core/Product.h
View File

@ -141,7 +141,7 @@ struct ei_traits<Product<Lhs, Rhs, EvalMode> >
| ((RowsAtCompileTime == Dynamic || ColsAtCompileTime == Dynamic) ? 0 : LargeBit)),
Flags = ((unsigned int)(LhsFlags | RhsFlags) & _LostBits)
| EvalBeforeAssigningBit
| ((int)EvalMode == (int)CacheOptimalProduct ? EvalBeforeNestingBit : 0)
| EvalBeforeNestingBit
| (_Vectorizable ? VectorizableBit : 0),
CoeffReadCost
= Lhs::ColsAtCompileTime == Dynamic

2
bench/benchmark.cpp
View File

@ -39,7 +39,7 @@ int main(int argc, char *argv[])
asm("#begin");
for(int a = 0; a < REPEAT; a++)
{
m = I + 0.00005 * (m + m*m);
m = Matrix<SCALAR,MATSIZE,MATSIZE>::ones() + 0.00005 * (m + m*m);
}
asm("#end");
cout << m << endl;